Tool-grinding attachment for lathes.



C. V. GHEENAIVIYER.

TooL GRTNDTNG ATTACHMENT For: LATHES.

A'PPLICATION FILED SEPT.1. 1916.

1,221,391., Patented Apr. 3,1917.

ms .wwf-els mens m Fuero-uma. wAsHwcmN. D C.

l@ @VFAF l FFlQ@ CLARENCE V. GREENAMYER, OF LOS ANGELES, CALIFORNIA, ASSIGNOR 0F ONE-HALF TO JOSEPH IVICMLLAN, 0F GLENDALE, CALIFORNIA. l

Specication of "Letters Patent.

' Patented api. s, miv.

Application filed September 1, 1916. Serial No. 11'?,987.

To all whom t may concern.

Be itlnown that l, CLARENCE V. (lumina-A MYER, a citizen of the United States, residing at the city of Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in rFool-Grinding Attachments for Lathes, of which the following is a specification. f

Heretofore when a lathe tool became dull it has been necessary for the mechanic to stop the lathe and take out the tool and walk over to the emery wheel and grind the tool. ln so doing a considerable time is consumed as the emery wheel is usually at a distance from the lathe. lt also frequently happens that several mechanics want to use the emery wheel for sharpening tools at the same time and some must wait while the others grind their tools thus losing still further time.

lt is the obj ect of my improvement to provide a simple attachment for grinding lathe tools which can be attached to any lathe and which will not interfere with its ordinary work, which can be instantly thrown into operative relation to be operated by the lathe and on which a tool can be ground and then be quickly thrown into an inoperative position, or if desired while the mechanic is working with one tool on the lathe he may at the same time grind another tool by throwing the grinder attachment into operative position as it will not interfere at any time with the ordinary working of the lathe.

In the drawings forming a part of this application:

Figure 1 is a top plan of a portion of a lathe with my grinder attachment in operative position thereon.

Fig. 2 is a right hand end elevation of the parts shown in Fig. 1.

Fig. 3 is a front elevation of my grinder attachment, taken from the left hand side of Fig. 2, detached from the lathe, witha part broken away.

In the drawings 5 represents the headstock of a lathe of any ordinary construction, on the front side of which ll mount my.

grinder attachment. Standard 6 is secured in place by bolts 7. ln the upper end of standard 6 is pivotally mounted at 8 the I shaft frame 9. ln the inner end of frame 9 is mounted a shaft 10 which carries a contact wheel 11 that engages pulley 12 of the lathe. The inner end of frame 9 is preferably bifurcated and shaft 10 passes across this furcation and has mounted thereon in said furcations a sheave wheel 13. The outer end of frame 9 is also preferably bifurcated and a shaft 111 is mounted on said end and passes across said bifurcations. On shaft 1-1 and in the furcations is mounted a sheave wheel 15 which is connected by belt 16 with wheel 13. Shaft 1li has mounted thereon an emery wheel or other grinding wheel 17. A brace arm 18 consisting of two parts connected by a hinge 19 located at one side of the longitudinal center of the arm is pivotally connected at 20 to standard 6 and passes through a slot 21 in frame 9. When pulley 11 is in contact with pulley 12 arm 18 is in the position shown in Figs. 1 and and the attachment is in its operative position ready to grind a tool when power is applied to run the lathe.

To prevent any accidental separation of pulleys 11 and 12 l coil spring 22 around the upper member of arm 18. One end of this spring bears on frame 9 and the other end bears against hinge 19. When arm 18 is broken outwardly or away from standard 6 wheel 11 is caused to separate from wheel 12 and spring 22 will then hold the frame so that wheel 11 will not contact with wheel 12 and the grinding attachment is then in its inoperative position. A pin 23 keeps the upper member of arm 18 from separating from frame 9.

By this construction it will be seen that I have provided a simple and inexpensive grinding attachment for a lathe which can be quickly thrown into an operative or inoperative position and which enables a mechanic to grind one tool while he is using another inhis lathe.

Having described my invention what I claim is:

1. A lathe attachment comprising a standard adapted to be attached to the headstock of a lathe; a shaft frame pivotally mounted on said standard; shafts mounted in said shaft frame, one at each end thereof; a contact wheel on one of said shafts and a grinder wheel on the other of said shafts; a belt pulley on each of said shafts; a belt connecting said belt pulleys; a jointed brace hingedly connected to said standard and passing upwardly through the shaft frame, the pivot of the joint in said brace being between thestandard and the center line of lil@ the brace; and a spring coiled around the.

upper member of the brace and bearing against the shaft frame and adapted to cause the contact Wheel to bear against the cone 10 shaft frame, one at each end thereof; a contact Wheel on one of said shafts and a grinder Wheel on the other of said shafts; a belt pulley on each of said shafts; a belt connecting said belt pulleys; and a brace adapted to hold said contact wheel engaging a cone Wheel of the lathe or disengaged therefrom.

In Witness that I claim'the foregoing I have hereunto subscribed my name this 7 th day of August, 1916.

CLARENCE V. GREENAMYER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, '.D. C. 

